Porsche P-80 2005, Manual

Page: 100 / 108

Page 6.10
Climate Control Systems Diagnosis & Repair
BUS Communications
Cayenne Data Bus Layout
On Cayenne prior to M.Y. 2005, the instrument cluster is
the gateway between the CAN - Drive Bus (CAN-C), the
CAN - Convenience (CAN-B) and CAN - Infotainment
networks. From M.Y. 2005, a separate gateway control
unit is used.
1 - Control Unit Wiper
2 - Compass Sensor
3 - Control Unit Parking Heater
4 - Control Unit Airbag
5 - Control Unit PSM
6 - Control Unit Automatic Level System
7 - Damping Control Unit
8 - Control Unit Center Differential Lockup
9 - Control Unit Axle Differential Lock
10 - Transmission Control Unit
11 - DMEControl Unit
12 - Xenon Control Unit
13 - Steering Column Control Unit
14 - Kessy Control Unit
15 - Rear Control Unit
16 - Control Door, Left Rear
17 - Control Door, Right Rear
18 - Control Driver’s Door
19 - Control Front Passenger Door
20 - Trailer Control Unit
21 - Vehicle Electrical System Control Unit
22 - Climate Control Element, Front
23 - Climate Control Element, Rear
24 - Control Roof
MOST (Media Oriented System Transfer)
Optical Bus
Data transfer rate: 21.2 M bits/second (21.2 M baud)
Failure mode: If a unit cannot relay data, no further
communication is possible due to the ring configuration of
the network.
25 - Control Unit Parking Aid
26 - Control Unit Tire Pressure Monitor
27 - Control Unit Seat Memory, Driver
28 - Control Unit Seat Memory, Passenger
29 - Gateway CAN Infotainment
30 - CAN Drive Unit
31 - Gateway CAN Convenience
32 - CAN Drive Unit, External
33 - K - Lead
34 - Amplifier
35 - MOST Bus
36 - CD Changer
37 - Radio CDR 23
38 - Gateway Radio - PCM
39 - PCM2
40 - Navigation Unit
41 - Telephone
A - CAN Drive
B - CAN Convenience
C - CAN Infotainment
D - K - Lead
E - Gateway Instrument Cluster